Train signaling and stopping device.



K. REGER. TRAIN SIGNALING AND STOPPING DEVICE. APPLICATION FILED MAY6.1915- Patented. June 12, 1917.

5 SHEETS-SHEET I.

WITNESSES;

' III/I/E/VTOR Kim" [FA-GEE, 32 BY A TTOR/I/EIS K.REGER. .TR'AINSIGNALING AND STOPPING DEVICE.

APPLICATION FILED, MAY 6'. '1915.

5 SHEE,TSSHEVET 2.

Z ".6 um 02% i H.

II/VVE/VTOR 2 ATTORNEYS v Patented June 12, 1917,

K.REGER. I R AIN SIGNA LINGAND STOPPING DEVICE.

APPLICATION FILED MAY (M1915.

LZ3Q Q3QQ PatentedJunlZlQl Y. I V, v, 5 SHEETSSHEET 3.

N N Q Pr) K.REGER TRAIN SIGNALING AND STOPPING DEVICE. I

APPLICATION FILED MAY6. 1915 1,280,080, Patented June 12, 1917.

5 SHEETS-SHEET 4.

TIHIW" 5 w I I II'IIIII IIII y III II E I I I'II mL-uuL LmlLl/I/I/E/VTOR K927 556w? I Afro/mm KI. REGERL TRAIN SIGNALlNG ANDSTOPPING DEVlCEJ APPLICATION FILED MAY 6, 1915.

1 Q3G U3Q b Patentd J 11113-12, 1917.

- WIT/M8858.-

i FEW/756's? I E fiimmvsrsi MENTOR To all whom it may concern:

i" snares mam @WWEQ KENT REG-ER, F BUCKHANNON, WEST VIRGINIA.

mam SIGNALING AND s'rorrms nnvrcn.

nzfsaoao.

ing and Stopping Devices, of which the following is a specification.

' An objectof my invention 'a device by means of which any one of aplurality of signals disposed along the My invention relates toimprovements intrain signaling and stopping devices, and it consists inthe combinations, constructions, and arrangements herein described .andclaimed.

track, may be thrown or operated from a central point or station.

A further object of my invention is to provide a device by means ofwhich the operation of the signaling device at any stameans involvingthe-use of one main wire.

I panying drawings forming part of this apg tion may be accomplished byelectrical or conductor, in other words, to provide a selective system.

A further ObJBCt of my invention is to provide train stoppingmechanisminclud- -ing trips arranged along the track which maybeselectively operated in conjunction with the signal, so as to stop atrain or engine at a predetermined point.

The invention involves the use of noveL apparatus including devices ateach of the.

stations, said devices being operated synchronously from the centralpoint or station so as to effect the selection.

Other objects and advantages will appear I ,ShOWn an actuatln'g'traln.This comprises in the following specification and the novel features ofthe invention will be particularly pointed out in the appended clalms.My invention is illustrated in the accomplication, in which v Figure lis a side view ofthe central station switch.

Fig. 2 is a plan view of the switch. Fig. 3 is a detail perspective viewof a magnetically operated stop member.

' Fig. 4 is a section along the line 4e4 of Fig. '51is a'section alongthe line 5-5*' of Fig.1)" Fig. 6 is a section along the line 6-6 of Fig.4.

Eigelis a section along the line 7-.7 of Fig. 5. l

REGER, a citizen Fig. 10

to provide Specification of Letters Patent. Patented Jung 12 1917,Application filed Ma 6,1915. Serial No. 26,281. i

Fig. 8 is a side View of one of the switches which are located at eachof tlie stations.

Fig. 9 is a section along the line 99 of Fig. '8. 1

is a section along the line 10-10 of Fig. 9. v

Fig. 11 is a side view of one of the semaphores or'signals.

Fig. 12 is a sectional view through one of trip casings located alongthe track, the

trip being shown in elevation.

Fig. 13 is a section along the line 13-13 v of Fig. 12.

Fig. 14 is a side .view of a steam line valve" lever and the mechanismfor releasing the same.

operating lever and the releasing mechanism.

Fig.16 is a plan view showing thereleasing mechanism for releasing thethrottle lever and the brake valve operating lever.

Fig. 1'7 is a, diagrammatic view showin the electrical circuit betweenthe centra station and the .varioussub stations, and

Fig. 18 is a diagrammatic view showing the circuit on the engine ortrain.

In carrying out my invention, I provide a central; station such as thatindicated at C in Fig. 17, at which is disposed a switch, the

details of which are best seen in Figs. 1 and I 2. From this centralstation I may control the signals at. any number-of stations. In Fig.171 haveshown six of such sub-stations, these being SflS and Srespectively. v

f Referring now toFigs. 1 and 2, I have spaced relation by ,a crossmember 3. ar-

ranged preferably at the four corners. J ourdesignated bvS, S S

naled inthe side plates 1 and 2 is a shaft 4 "which projects beyondthepplate 2 and upon which is a series of conducting circ u; lar disks(2', .03 ,03 (P, and d respectively, corresponding to the number ofstations to be operated; .The disks are held in spaced relation bymeansnof metal spacing disl as, 5; These disks d, (Z etc., arepreferably made of copper or other conducting ,niaterial, andare'slottedor recessed on their 1. peripheries as shown at 1" in Fig. 5.The

disks (1, (Z3, etc., have recesses 1", 7, etc., disposed approximately60" apart since in this particular instance, there are six stations.

On the shaft 4 is also a disk a made of The disks d, 03 etc., aredesigned to'be 'rotated by'the actuating train-shown in Figs. 1 and 2.From these figures it will be observed that a weight-W is attached tothe end of a chain or cable 7 which passes over a reel 8 on a shaft 9.The shaft 9 bears- I a gear 10 which en ages a gear 11 on the shaft 41,thereby ten ing to rotate the disks when the shaft '4 is permitted torevolve.

' --The shaft 4 bears a gear 12 which engages '15 that inturn engages apinion 16 on the shaft 17 carrying a stop or escapement wheel 18. Itwill readily be seen that the wheel 18 mustrevolve if the shaftti-evolves, and .if the escapement wheel- 18 is stopped, the

' shaft'4 W111 be stopped likewise.

l The'means for stopping or releasing the escapement wheel 18 consistsof a stop lever like that shown at 19 in Fig; This lever is provided.with a pivot shaft 20 journaled' in thefwalls l and 2, one end ofthelever serving as an armature for the magnet .11, the opposite .end beingbent laterally as shown at 1992 so'as to engage the teeth of theescapement wheel 18. .Alaterally extending -arm 19y projects above thedisk e'but when the armature end of the lever 19 is deener gized,thelaterally, bent end'lQm tends to drop down into engagement with theteeth of-the escapement wheel 18, -see Fig. 4. It is prevented fromengaging the teeth of the escapeinent wheel 18, however, by theengagementjof the laterally extending portion of the arm 19y with thetop" of the insulate ing wheel -e' until the latter has been revolvedfar enough to bring one of. the slots 6, e ete. into alinement with thelaterally projecting portion. of the arm 19y: whereupon the latter dropsdownwardly .and thus per- 1 mits theportion .1900 to enter between theteeth of the esea'pement wheel" 18, thus stopping-theactuating train. Aslong as the magnet Mv attracts the armatureen'd of the lever 19, theactuating mechanism is free to revolve under the action of theweight W,

as will be e plainedzlater.

Secured-toone of-the side walls such as that shown 'at-2 is a bracket 23which bears a cylindrical rod 24on-which is pivotally and slidablymounted a cylindrical sleeve or bearing'p ortion 25 ofalaterallycxtending conducting member or arm 26 having a handle 26w atits end.- The arm 26 is provided with an integral contact member 26ywhich is arranged to engage any one of a number of conducting pins orpegs extending upwardly from an extension of' the bracket 23, theextension being shown at 23m and the pins at 231 As will be seen Fig. 6,

in its periphery, as shown at 6", e 6, etc.,

the bracket 23 is suitably insulated from the plate 2. A companionbracket 23a is secured to theplate '1, .being insulated from it asclearly shown in'Figs. 1 and 2. The pivot rod 24- has one end secured tothe bracket 23a. Theopposite end of the pivot rod. 24; is provided withacollar'27. The member 261 is provided with a groove 262 on itsbottomwhich is arranged to receive the edge of any of the disks'd, (2 etc, seeFig. '1, so as to let the arm 26 ride on the edge of the disk while thelatter is revolving, thereby forming the revolution of the disk, as willbe explain'ed' later. The sleeve 25, to" which the a gear ,13 on'a-stubshaft 1 1 bearing a gear z. e., the disk d: When the bearing sleeve 25isin' contact with the collar 27 then the arm 26 will r'eston the outerdisk at? whilethe side of the arm 26 will engage the peg or pm 231 Whenthe arm 26 is riding on the edge of any of the intermediate disks, theside faces of the, arm will engage pegs on ;each side as shown 'in Fig.6, thus making a goodlconnection between the arm and the bracket 23. Thearm 26 may be swung upwardly by means of the handle 26m and canbe'shifted laterally,'the sleeve 25. sliding on the rod 241, so as tobring the arm 26 and its contact I 261 into electrical connection with[any of the disks, which as stated before correspond to the diflerentstations. These sta 5, 6, as shown tions are numbered 1, 2 3, 4:, on thebracket 23% in F1g.;2.

Inorder to prevent the actuating train from running too fast, I providea centrifu gal governor, the shaft 30 of which is journaled in'the sidewalls 1 and 2. Secured to the shaft is a pinion 31 which meshes withtheescapement wheel. 18. The governor is also provided with arms 32which are secured to the shaft, and. has a slidable sleeve 33 pi'votallyconnected by links 34 with the arms 32,said sleeve passing through aslotted arm 35 and being provided with a friction the machine is runningtoo fast, the arms 32 will be spread apart thus drawing on. the sleeve33 and bringing the friction 'disk up against the face of the arm 35.The latter is secured at one end to the plate 1, and is, in fact, aspring arm, so that the friction exerted between the disk 36 and thespring arm 35 will gradually. slow down theapparatus, or rather, it willprevent too rapid a motion.

1 disk 36,- see Fig. 1. It is, obvious that when .The apparatus" whichis installed at the 7 various stations, as faras the actuating train andthe means for stopping the same,

is concerned, .is practically identical with that at the centralstation. In the drawings I have indicated the parts whicha're similar tothe parts at the central stat1on, by the same reference letters with theaddition of the subscripts. The apparatus is best shown in Figs. 8 and9. In these figures it will be observed that the insulating disk as ispro-- vided with the slots eta, (2 s, e 8, 6 8, etc. In Fig. 9, the arm19ys is shown in the slot 6 8. The disk shown in the figure is arrangedfor the station S see'Fig. 17, and it will be observed that adjacent tothe slot 6 8 there is a conducting member 40 which the arm 19ys'isadapted to engage iust before its entrance into the slot 638. The otherstations have one conducting member like the member 40, adjacent one ofthesix slots inthe wheel es.

For the station 1, its wheel es would have the conducting member 40adjacent to the slot es; for the station S the; wheel would have theconducting segment adjacent to the slot 6 8, and so on as shown in Fig:17.

At each substation a signal is arranged like that shownin Fig. 11. Thisconsists of a semaphore arm 41 which is pivotally mounted at 42 upon amast or upright 43.

The normal or clear position of the signal is vertical and it is held inthis position by means of a catch 44 which is-pivoted'at 45 and isnormally acted on by a sprin 46. The end of the catch on the opposite sie of the pivot has an armature 47 associated with amagnet48. When thearmature 47 is attracted it will release the arm 41, thereby permittingit to swing down into the danger position shown in dotted lines in Fig.1.

Associated with each substation is one or more of the trip mechanismsbest shown in Fig. 12. This. consists of a casing 49 in which is mounteda plunger 50 pressed uponby a spring 51 and hearing at its top ahorizontally disposed impact member 52, curved at both ends. Normallythe plunger 50 is held by means of a sprlngpressed catch or brakevalve'operating lever 61, see Fig. 15.

In Fig. 17 I have shown diagrammatically the circuit connection betweenthe central" station C and the stations "S, S, S etc.

The operation of this signaling and train stopping mechanism'will bestbe understood by taking a specific, example.

Let us assume that the operator at the-central station C wishes tosignal a certain train the station S It consists of a catch 57 to stopat station S and also wishes to set a trip so that if'the engineer doesnot obey'a signal, the train will be stopped in spite of his actions.The operator at the central sta- .tion C lifts the handle 260a andslides the latter longitudinally of the rod 24 until the arm 26 is overthe disk d corresponding to He then lowers'the handle so that thecontact26y engages the edge of the-disk 01?. .As long as the contact 26yis engaging the disk 03*, currentwill flow from the battery B, see Fig.17 throughthe main line wire L, from ground through the magnet-M, shaft4, disk (5 26, and back to battery. It will be noted-that the magnetsM,MS, M 8, etc., all act simultaneously. The actuating mechanism at eachstation begins to revolve its disk 6, while the actuating mechanism atthe central station begins .to

revolve the six disks d, (P, etc.-, as well as the disk'c. The apparatusat the central station ,and at the substations continues to revolveuntil the slot or groove r of the disk (5 comes into registration withthe contact 26y, whereupon the current will be broken at this point.This, it will be observed from Fig. 17, is just before theend 19y of thelever 19 reaches the slot or recess 6 of the disk 6. A slight furtherrotation will. permit the arm to enter the slot and thus per- 9b mit thelaterally bent end 1950 of the; lever to engage the. escapement wheel18'of'the central station. thus stopping the actuating mechamsm.

, When the'disk e of the substation starts to revolve by thesimultaneous action of the control magnets, MS, M S, M S,-etc., theyrevolve synchronously owing to the action 01 the governor. When thecurrent is cut oli from the main line L by. the registration of the slotor recess 1' of disk (Z with the contact 26y, see Fig. 17, then thelevers 19s,

198 etc., will drop downwardly simul taneously. The cutting ofi" of thecurrent is timed so that the lever drops down just after the slot in thedisk e atthe station at which the signal isto be shown, which :isimmediately in frontv of, or which; precedes the slotin which it is.desired that the end of the lever shall rest,- has passed -vthe' end ofthe lever. Consider Fig. 17 Theen'd of the lever19s drops downwardlyjustafter the recess 6 8 has passed theend of the'lever with the disk erotating in the direction shown by the arrow. The end of the lever 198will therefore rest on the surface-of the 7 disk 6. The ends ofthe otherlevers correspondingto 19s at the various stations, will rest on theirrespective disks. Further rotation of the disk 6 at the various stationswillbring the end of the lever 195 into an instant prior to itsregistration with the engagement with the contact 40 at station 8 recess6 8. This condition is shown in Fig.

17 at station S It will observed that the levers corresponding to thelever 19:; at the other stations, are none of them in engagement withthe contacts at the peripheries of .the disks 6, since, as statedbefore, these contacts are placed adjacent to the particular recess atwhich it is desired to stop the 'rotationof the disk. With the end ofthe lever 19 engaging the contact 40, a

' circuit will be established from the local battery B, through thesecontacts and through the release magnet 54:8 which will release thecatch to permit the trip 528 to be. projected into the path of thespring conmechanism, and also of the brake valve lever releasingmechanism. This will cause the i steam to be shut off and the brakes'tobe. set, thereby causing the stopping of, the

train.

At the same time the magnet 488 will cause the operationof the trip4:4:8 to release the semaphore 418 so as to bring it to danger positionshown in Fig. l7.v

It will be observed that the local circuit through the battery B isclosed only for an instant, so that when it is desired to reset thesemaphore, it may be done by pulling downwardly, on a cord or othersuitable member I v,

tro-magnet acting on the opposite end of the such as that shownat 7 O inFig. 17 at station S The trip may also be reset by pushing downwardlyonit until it comes into engagement with the catch. i

I have explained how the signal and trip at one of the stations may beoperated, but

it is obviousthatthe others are operated in the same manner. The"recesses such as that. shown at r in the disk 0Z whichcause the cuttingofl-of the current, as already explained, are arranged in definiterelation with respect to the recesses 6'8, 6 8, e s, ,etc.,

so that all the operator at the central station has to do, is to placetheconducting arm upon the proper disk at the central station asdescribed, whereupon the apparatus will start 'up and the signal andtrip will be thrown.

It will be seen from the description given that the apparatus ispositive in action and j requires only slight efi'ort on the'part of thecentral station operator to correctly manip- .ulate the device. Iamawarethat other forms of the device based upon the same general plan,might bemade without departing from the spirit of thsinvention.

1. In a train signaling and stopping de -p vic a selector switchcomprising a plurality 0t movable conducting disks having a common axis,each of said disks being prodisposition around their common axis, a

single conducting arin arranged to engage lating disk having a series ofradially extendlng notches at the periphery of the disks, an actuatingmechanism for rotating all of said disks including an escapement wheel,means normally in engagement with said escapem'ent wheel for stoppingthe rotation of said insulating disks, and electromagnetic means forwithdrawing the said stopping mean-s clear of the escapement theperiphery of any of said disks, an insuwheel and thereby permitting therotation of the disks.

2. In a train signaling and stopping device, a selector switchcomprising a plurality of movable conducting disks havinga common axis,each of said disks being .pro-

vided with a' recess on its periphery, the recesses 0f the disks .beingdisposed in sucsingle conducting arm arranged'to engage" the peripheryof any of said disks, an insulating disk having a'series of radiallyextending, notches at the periphery of the disks, an actuating mechanismfor rotatin-g all of said disks including an escapement wheel, a leverhaving one end arranged to engage said escapement wheel for stopping theactuating mechanism, an elec- 'over and rest upon the periphery of saidinsulating disks.

3. In a train slgnalingandstoppin'g device, a selector switch comprisinga plurality of conducting disks, said disks being mounted to'rotate on acommon axis, each of said disks being provided with a single recessin'its periphery, the recesses of the disks being disposedlri'successi've steps with respect to their angular dispositlon aroundtheir common axis, and a'single conducting arm arranged to engage theperiphery. of any of said disks.

.4. In'a train signaling and stopping device, a selector switchcomprising a plurality of conducting disks, said disks being mounted torotate on'a common axis, each of said disks being provided with a singlere cess in its periphery, the recesses of the disks I being disposed insuccessive'steps with respect to their angular disposition around theircommon axis, a single conducting arm arranged to engage the periphery ofany of said disks, means for rotating the disks, the rotation of. thedisks serving to bring'the conducting arm eventually into registrationwith the recess in the periphery of the disk.

5. In a train signaling and stopping device, a selector' switchcomprising a plurality of conducting disks, said disks being a mountedto rotate on a common axis, each of saiddisks being provided with arecess in in the-disk isin registration with the con-- ducting arm thecurrent will 'be'cut OE and the rotation of the disks .Willbe stopped.

6. In a train signaling and stopping device, a selector switchcomprising a plural- H ity of conducting disks, said disks being mountedto rotate on a common axis, eachof said disks beingprovided with asingle recess in its periphery,'the recesses of the disks being disposedin successive steps withrespect to their angular disposition aroundtheir common axis, a single conducting arm arranged to engage theperiphery of any of said-disks, means for rotating thedisks, the

rotation of the disks serving to'bring the' conducting a'rm eventuallyinto registration with therecess in the periphery of the disk,

and means for regulating the speed of rotation ofthe disks.

7. In a trainsignaling and stopp1ng device, a selector. switchcomprising a plurality of conducting disks, said disks being mounted torotate on a common axis, each of said disks being provided wlth a singlerecess in its periphery, the recesses of the disks being. disposed insuccessive stepswith a respect -to their angular disposition aroundtheir common axis,.a single conducting arm arranged to engage theperiphery of [any of said disks, means for rotating the disks,

- the rotation of the disks serving to bring the conducting armeventually into regis tration with the recess in the periphery of thedisk, and a governor for, regulating the' speed of rotation of thedisks.

4 8. In a train "signaling and stoppingdeavice, a fra'me, a rotatableshaft mounted on said frame, a plu'rality of parallel conducting diskscarried by said shaft, the periphcry of each disk being provided with asin-- gle" recess extending toward the center of the shaft, the recessesof the various disks being in stepped relationwith one another aroundthe shaft, a second shaft parallel.

with said firstnamed shaft, 'a single arm loosely mounted on said secondnamed shaft, and slidable on said shaft longitudinally. of

v the latter, said arm being arranged toje'njgage any of said'coriductmgdisks, a series, of contacting members, one of said contacting membersbeing engaged by' the arm' durmg engagement with any of said disks.

a 9.- In a't'rain signaling and stopping idevice,-'a frame,-rotatable'shaftmounted on stepped relation, with one another around nth"e shaft, -a' second'shaft parallel With said first named shaft, a"single arm loosely 'mountedion said secondnamed shaft and slidable onsaid shaft longitudinally of the latter, said arinbeing arranged toengage said frame, a plurality of parallel conduct M ing disks carriedby said shaft, the periph- -ery of each disk being provided with asingle recess extending toward the center of the shaft, the recesses ofthe various disks being in stepped relation with one another 'around theshaft, a second shaft parallel with said first named-shaft, a'single armloosely'mounted on said second named shaft andslidable 'on said shaftlongitudinally of -the latter, said arm being arranged to en-- gageanyof said conducting disks, a series of contacting members, one of saidcontacting members being engaged by the arm duri ing engagement with anyofsaid disks, an

actuating train for rotatingthe shaft upon which the disks are mounted,and electro- -magnetic means for stopping the actuating I train.

10 Ina train signali g and stopping device, a frame, a rotatablesha'ftmounted on said frame, a plurality of parallel conduct ing-diskscarried by said'shaft, the periphery of-each diskbeing provided with arecessf extending toward the center of the ing in stepped relationwith-one. another around the 'shaft,;'a' second. shaftparalle'l; withsaid first named shaft, a single arm loosely mounted on said secondnamed shaft shaft, the recesses ofth'e various disks be and slidable onsaid shaft-longitudinally of I the latter, said arm being arranged toengage any of said -.conduc ti n'g disks,-'-a series of contactingmembers, one of said contactingmembers being. engaged by the arm duringengagement with any of said Pdisks, an actuating train for rotating theshaft upon-which the disks -,are mounted, electromagnetic meanscontrolledby the relative position of the'disks, and a conducting'a'rmfor stopping the actuating train.

' 11. Inatrain signaling and stopping de vice, aframe, a rotatable shaftmounted on said frame, a plurality of parallel conducting diskscarried-by'said shaft, the periphery of each disk being provided with arecess extending toward the center of the shaft,

the recesses of the various disks "being in; j

any of. said conducting disks, a series of members being engaged by the'arm' during ating which the disks are mounted, electro magnetic meanscontrolled by the relative position of-the disks, and a conducting armfor st'oppingthe actuating train, saidlast-named means comprising amovable lever arranged to move into a port on of said actuatingvcontacting members, one of said contacting engagement with any of saiddisks,'a i, actutrain for' rotating the shaft upon.

a train, a magnet for Operating the lever, and I an energizing circuitfor said magnet, said energizing circuit including said' conducting armand a disk with which it engages.

12. In a-train signaling and stopping device, a switch comprising aninsulating disk, a series of radiallyextending notches at the peripheryof the disk, a conductor. disposed adj acent'to one of said notches, anactuating mechanism for rotating they said disk in cluding an escapementwheel,- means normally in en-gageinent with said escapement I wheelforstopping the rotation of said insulatingdisk, and electro-magneticmeans for raising said stopping means clear-of the escapement Wheel andthereby permitting the rotation of the disk.

i 13. In a train signaling and stoppingdevice, a switch comprising aninsulating disk,

a series of radially extending notches at the periphery of the disk,aconductor disposed adj acent to one ofsaid notches, an actuatingmechanism for rotating said disk including an escapement wheel, .a leverhaving one end arranged to-engagesaid escapement wheel j for stoppingthe actuating mechanism, an

"electro-magnet actuating on the opposite end of the lever for raisingthe same, and

an arm carried by said lever and arranged to extend over and restuponthe periphery of the insul'atipgdisk. I 4

14:. In a tra n signaling and stopping device, a switch comprising aninsulating disk,

' ,a series of radially extending notches at the periphery of the disk,a conductor disposed I adjacent to one of said notches, an actuatingmechanism for rotating said disk including a'n escapement wheel, a leverhaving one end arranged to engage said escapement wheel for stopping theactuating mechanism, an electro-magn'et actuating on the opposite end ofthe lever for raising thev same, and an armcarried by-saidlever andarranged to extend over, and rest upon the periphery of the insulatingdisk, the passage of the con'-. ducting member carried by the disk pastthe last named arm serving. to effect electrical connection between theconducting member and the arm. n

15. In a train'signaling and stopping device, a switch comprising aninsulating disk, I I

a series of radially extending notches at the periphery of the disk, aconductor disposed I adjacent to oneof said notches, an actuating signaloperating device adapted to be closed by the engagement of the arm withthe conducting member. a KENT REGER. 3

Witnesses:

CHAS. WI MOLAnGHLIr I,

.' "ERNEST'PHIILIPS.

